A Flyertalk member of a Household Account has received an email which appears to indicate that BA are not going to allow transfer of BMI Diamond Club points to BA household accounts. I am greatly disappointed by this as I had hope to move my 200,000 bmi miles to BA on 3 July, when transfers start.
However, it does match the same rule with the former AirMiles balances where the now-Avios account is a Household Account:
Removing people from your Household Account can be problematic too – if they are under 18 – their Avios balance is wiped out as under 18’s cannot be members of Executive Club. This is the message you receive when removing members of your Family Account: